Stora Wäsby Castle, Manor house in Upplands Väsby, Sweden

Stora Wäsby is a manor house with a two-story stone main building designed in Rococo style, featuring balanced proportions and detailed ornamentation throughout. About ten additional protected buildings surround the main structure, forming a complete noble estate complex.

The estate is documented from the late 14th century and was owned by the Kurck family before Knut Kurck sold it in 1668 to Emanuel De Geer, who laid out the garden and built the Caroline manor that preceded the present house. In 1730 it became a fideicommissum of the De Geer family. Carl Hårleman's plans for the new main building took shape in 1748 and work began in the early 1750s; still unfinished in 1759, it was completed after Hårleman's death by Jean Eric Rehn.

The De Geer family shaped this place as their home and business center over many generations, leaving traces throughout the rooms you can still see today. The estate reflects how Swedish nobility lived and worked in the countryside.

The main buildings stand where two avenues meet: a 1,400-metre axis runs in from the east, and a second avenue approaches from the south. The railway, laid west of the castle in the 1860s, and the E4 motorway, which took part of the park's east side in the 1960s, cut through the former grounds. The long orangery designed by Rehn, now offices, remains on the park's north side.

The Baroque garden was begun in the late 17th century with input from Nicodemus Tessin the Younger and had three ponds. The railway, laid west of the castle in the 1860s, and the E4 motorway, which took part of the park's east side in the 1960s, cut through it; much is overgrown and restoration has begun.